The Apple Watch was built with the intention of being a health and fitness gadget. Most wearable devices can take our pulse and measure our blood pressure. Apple took this to the next level when it introduced a new feature this year. In this episode of Komando on Demand, Kim takes a look at the new Apple Watch Series 4 and its new ability to take an ECG. But how reliable is it? Kim talks to Sergei Shatillo P.A., who works with heart transplant recipients at the Mayo Clinic, about common heart ailments and how the Apple Watch Series 4 can impact people's lives.